import numpy as np
import matplotlib .pyplot as plt
x = np.array([1,2,3,4,5,6,7,8])
y = np.array([1,4,9,16,7,11,23,18])
plt.scatter(x,y,s=200,c='r')
plt.xlabel('x')
plt.ylabel('y')
plt.title('Simple Diagram')
plt.show()